Seagate ST9250412AS Momentus 7200 FDE.2 SATA Product Manual - Page 39

Identify Device command

Page 39 highlights

4.2.5 Identify Device command The Identify Device command (command code ECH) transfers information about the drive to the host following power up. The data is organized as a single 512-byte block of data, whose contents are shown in the table below. All reserved bits or words should be set to zero. Parameters listed with an "x" are drive-specific or vary with the state of the drive. The following commands contain drive-specific features that may not be included in the Serial ATA specification. Word 0 1 2 3 4 5 6 7-9 10-19 20 21 22 23-26 27-46 Description Configuration information: • Bit 15: 0 = ATA; 1 = ATAPI • Bit 7: removable media • Bit 6: removable controller • Bit 0: reserved Number of logical cylinders ATA-reserved Number of logical heads Retired Retired Number of logical sectors per logical track: 63 Retired Serial number: (20 ASCII characters, 0000H = none) Retired Retired Obsolete Firmware revision (8 ASCII character string, padded with blanks to end of string) Drive model number: (40 ASCII characters, padded with blanks to end of string) Value 0C5AH 16,383 C837H 16 0000H 0000H 003FH 0000H ASCII 0000H 8000H 0004H x.xx ST9500421AS ST9500426ASG ST9500422AS ST9500421AS ST9320427ASG ST9320426ASG ST9320426AS ST9250464ASG ST9250414ASG ST9250412AS ST9250411AS ST9160419ASG ST9160418ASG ST9160413AS 47 (Bits 7-0) Maximum sectors per interrupt on Read multiple 8001H and Write multiple (16) 48 Reserved 4001H 49 Standard Standby timer, IORDY supported and may be dis- 2F00H abled Momentus 7200 FDE.2 SATA Product Manual, Rev. B 33

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Momentus 7200 FDE.2 SATA Product Manual, Rev. B
33
4.2.5
Identify Device command
The Identify Device command (command code EC
H
) transfers information about the drive to the host following
power up. The data is organized as a single 512-byte block of data, whose contents are shown in the table
below. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or vary
with the state of the drive.
The following commands contain drive-specific features that may not be included in the Serial ATA specifica-
tion.
Word
Description
Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5A
H
1
Number of logical cylinders
16,383
2
ATA-reserved
C837
H
3
Number of logical heads
16
4
Retired
0000
H
5
Retired
0000
H
6
Number of logical sectors per logical track: 63
003F
H
7–9
Retired
0000
H
10–19
Serial number: (20 ASCII characters, 0000
H
= none)
ASCII
20
Retired
0000
H
21
Retired
8000
H
22
Obsolete
0004
H
23–26
Firmware revision (8 ASCII character string, padded with
blanks to end of string)
x.xx
27–46
Drive model number: (40 ASCII characters, padded with
blanks to end of string)
ST9500421AS
ST9500426ASG
ST9500422AS
ST9500421AS
ST9320427ASG
ST9320426ASG
ST9320426AS
ST9250464ASG
ST9250414ASG
ST9250412AS
ST9250411AS
ST9160419ASG
ST9160418ASG
ST9160413AS
47
(Bits 7–0) Maximum sectors per interrupt on Read multiple
and Write multiple (16)
8001
H
48
Reserved
4001
H
49
Standard Standby timer, IORDY supported and may be dis-
abled
2F00
H